Here is a simple recipe for " traditional Scottish Soda Scones" that I like:

1/2 cup flour
1/2 tsp Baking Soda
1/2 tsp Cream of Tartar
pinch of salt
2-3 oz of milk

mix dry ingredients with enough milk to make a "workable dough". Spread out (roll) until about 1/2 inch thick. Cook in buttered frying pan over medium heat about 4 minutes, or until slightly brown, then turn over and cook until lightly brown.

This is not my recipe; I found it here (full instructions):
http://www.helium.com/items/1716122-how-to-make-traditional-scottish-soda-scones/

I like this because it is quick, simple and tasty. It also (being pan cooked) seems like Bannock, and might be adaptable for the field.